Engine.



No. 784,290. PATENTED MAR. 7, 1905.

R. WHITEHILL, DECD.

m. n. WHITBHILL, ADMINISTBATBIX.

ENGINE.

APPLICATION nun 0013.3, 1903.

75 v al/P791071 2 SHEETS-SHEET '1.

To'EaceIJM'c WEccenZra'c 7'0 Governor nzwenznb flIII T01: 6 M 16 No.784,290. PATENTED MAR. 7, 1905. R. WHITEHILL, DEGD.

I. E. WHITEHILL, ADMINISTBATBIX.

ENGINE.

APPLIOATION FILED OUT. 3, 1903.

2 SHEETS-SHEET 2.

616711725525.- JJ fi m NITED STATES Patented March '7, 1905.

PATENT OFFICE.

ROBERT IVHITEHILL, OF NEIVBURGH, NEW YORK; MARY E. IVHITEHILL ADhIINISTRATRIX OF SAID ROBERT IVHITEHILL, DECEASED.

ENGINE.

SPECIFICATION forming part of Letters Patent N0. 784,290, dated March'7, 1905.

Application filed October 3, 1903. Serial No. 175,548.

To all whom, it .mn/y concern:

Be it known that 1, ROBERT IVHITEi-IILL, a citizen of the United States,and a resident of Newburgh, in the county of Orange and State of NewYork, have invented a new and useful Improvement in Engines, of whichthe following is a specification.

My invention relates to an improvement in engines, and more particularlyto the valve- IO gear, the object being to effect the closing of thesteam-inlet valves by steam under low pressure in place of the vacuumheretofore employed.

A practical embodiment of my invention is 5 represented in theaccompanying drawings, in

which Figure 1 is a view in side elevation of my improved valve-gear,showing it applied to a cylinder. Fig. 2 is a similar View, partly insection. Fig. 3 is an end view of the said gear. Fig. 4 is a view of thevalve for admitting steam to the dash-pot, showing the same inconnection with its casing centrally in the plane of the line D D ofFig. 3. Fig. 5 is a 5 view of the same in longitudinal section in theplane of the line E E of Fig. 4, and Fig. 6 is a'transverse section ofthe same in the plane of the line F F of Fig. 5.

The general arrangement of the valves with 3 respect to the cylinder isthat commonly used in the Corliss engine.

The cylinder is denoted by 1,thevalvecham bers for the admission ofsteam by 2 and 3, and the valve-chambers for the exhaust of steam by 4and 5.

The dash-pots 29 30,while still retaining the cushioning feature, havein my present improvement the heretofore vacuum portions converted intosteam-cylinders for actuating 4 the plunger-s, one of which plunger-s isshown in section in Fig. 2 and denoted by 31.

The means for admitting steam to operate the plungers in the cylinders29 and 30 is shown on a small scale in Fig. 2 and on a large scale inFig. 4.

teferring to Fig. 4, the bottom of the dashpot or, more properly,cylinder 29 has in connection therewith a casting in which there is avalve-chamber 32 for the reception of a rockv ing tubular valve 33,balanced by means of a 5 core 34 in a manner quite similar to thathereinabove described with respect to the steam inlet and exhaustvalves. Steam is admitted to the valve-chamber through an inlet-pipe 35and port 36 and is exhausted through a port 37 in connection with anexhaust-pipe 38. A reducing pressure-valve, not shown, but of anywell-known or approved form, may be employed to reduce the pressure ofthe steam in pipe 35. A port 39 leads from the valvechamber 32 to thelower end of the cylinder 29.

The valve 33 is provided .with the proper cove, so that when rocked intothe position as shown in Fig. 4 it will permit the steam to exhaust fromthe cylinder 29 and when rocked 5 over toward the left will permit thesteam to enter the cylinder 29 and by its force lift the plunger 31 andpromptly close the steam-inlet valves.

The valve 33 is operated by means of a rod 7 40, (see Fig. 1,) leadingto an arm 41 on a spindle 42, which spindle also carries the hook 43 anda knock-off lever 44, the latter in engagement with the cam 45 underthecontrol of the governor, as is common in this type of englue.

The point where the arm 41 is connected with the rod 40 is in axialalinement with the steam-inlet valve, so that the bodily movement of thehook and its spindle and the parts carso ried thereby in a circular pathby the action of the arm 46, connected with the rod 47 leading to theeccentric on the engine-shaft, will not affect the valve 33 until thespindle 42 is itself rocked in its bearing 48 by the engage- S ment ofthe knock-off lever 44 with the cam 45. This engagement is so timed thatsteam is not admitted to the dash-pot or cylinder 29 or 30 until afterthe hook is unlatched.

hat I claim is 9 In valve-gear, steam-inlet valves, means for openingthem, steam-cylinders, and plungers, one for each valve, for closing thevalves, valves for admitting steam to the said cylinclers, rockingspindles, arms on the rocking my inventionI have signed my name, inpresspindles, valve-operating rods connected With ence of two Witnesses,this 29th day of Septhe said arms at points in axial alinement Withtember, 1903.

the steam-inlet valves, cams under the control ROBERT WHlTEHILL. of thegovernor and knock-01f levers in the WVitnesses: spindles in position toengage the cams. FREDK. HAYNES,

In testimony that 1 claim the foregoing as C. S. SUNDGREN.

